Patterns are a combination of styles and components which enable a user to complete something in a consistent, repetitive way.

Backlog
Pattern Summary
Ask users for feedback Allows users to give feedback about a page, feature or overall service.
Search Different types of search across a list, table, page, or product.
Show performance data Displaying performance data about a product or service in a consistent way.
Video Presenting video along with transcripts ensuring they are accessible.

If you have a pattern you want to see in the design system, follow the contribution guidelines.